Computing-scale.



No. 762,136. PATBNTED- JUNE 7, 1904.

' A. B. CAMPER.

COMPUTING SGALE.

APPLIGATION rum) AUG. 24, 190s.

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y PATENTED JUNE '7, 1904. A. B. CAMPER. COMPUTING SCALE.

APPLICATION FILED AUG. 24, 1903.

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UNITED STATES Patented June '7, 1904.

PATENT QEEICE.

COMPUTING-SCALE.

SPECIFICATION forming part of Letters Patent No. 762,136, dated June '7,1904.

Application iled August 24, 1903. Serial No.l70,634. (No model.)

T0 all whom t mfr/y concern.'

Be it known that I, ALBERT B. CAMPER, a citizen of the United States,residing at Roanoke, in the county of Roanoke and State of Virginia,have invented a new and useful Gomputing-Scale, of which the followingis a specification.

This invention relates to computing-scales, and more particularly tothat type of computing-scale in which two pointers are actuated bysuitable mechanism when a quantity of any material is placed on thescale-platform to indicate upon a suitably-marked dial the weight of thematerial and the value thereof when the price per pound has been notedby a suitable price-indicator upon a graduated scale provided for thatpurpose.

The object of the invention is to provide in a computing-scale of thetype specified a simple mechanism which will be positive in operationand not easily deranged by means of which the value of goods to be soldby weight may be accurately determined with great facility by merelysetting at the proper point upon the scale of prices per pound asuitable indicator.

A further object of the invention is to provide in a computing-scale ofthe type speciiied means for bringing the weight and value indicating'hands to rest quickly, and so avoiding the loss of time which isoccasioned in most computing-scales of the type to which this inventionrelates by the vibration of the hands or pointers which move over thedial.

The invention consists in the combination and construction of parts of acomputingscale, as hereinafter described, illustrated in theaccompanying drawings, and having the novel features thereofspecifically pointed out in the appended claims.

In the drawings, Figure l is a view in front elevation of a scaleconstructed in accordance with this invention, part of the scale-casingand dial being broken away to show the internal construction of thescale. Fig. 2 is a view in side elevation of the scale with a part ofthe casing removed. Fig. 3 is a detail view from the front of thevalue-computing mechanism detached from the rest of the scale structure.Fig. 4l is a detail view in section,

showing the construction of the price-scale and the indicating-slidewhich moves thereon. Figs. 5, 6, and 7 are detail views showing themeans for actuating the weight and value indicating pointers and thecounterbalance-shaft by which they are brought to rest.

Referring in detail tothe drawings, in which corresponding' parts aredesignated by the same characters of reference throughout, B designatesgenerally the base of the scale, at one end of which rises a verticalcasing designated generally as C.

P is the platform, which is suitably supported upon a member l, restingupon trunnions 2 at the sides of a circular frame 3 and held inhorizontal position by means of suitable mechanism, (not shown,) whichconnects with the end of a pendent stem et. The frame 3 is supported atone margin upon a knifeedge 5 of the ordinary type and at the oppositeside is supported by a hook 6, suspended from the bottom of a framedesignated generally as '7 and comprising the T-shaped member 8, eachend of which is supported by a spiral spring 9, the vertical members l0,riveted to the T-shaped member just beneath the springs 9, as shown, andthe transverse member Il, supported by the vertical members l() andgraduated, as best seen in Fig. 3, to form a scale l2 of prices perpound. Extending upward from the frame 7 at the middle thereof is avertical arm 13, the upper portion of which is formed into a rack l-lfor engagement with a small pinion l5, which is rigidly secured upon thehorizontally-disposed shaft 16, which is mounted in bearings at thefront and rear of the casing. rlhe shaft 16 is provided near its rearend with a gearl, also rigidly mounted thereon, which is in mesh with asmall pinion 18 upon a shaft 19, parallel with the shaft 16 and providedwith a dnmb-bell-shaped weight 20, whose utility will presently bepointed out.

Slidably mounted upon the transverse bar Il to cooperate with theprice-scale l2, formed thereon, is an indicator-slide 21, comprising aframe 22, rollers 23, 2l, and 25, arranged so as to prevent vibration ofthe slide on the bar, while permitting free movement longitudinally ofthe bar, the vertical arm 26, rising IOO L screw 39 at their pivotalpoint.

from the frame 22 and provided with an eye for engagement with alever-arm presently to be described, the pointer 27, and thespringpressed plunger 28, by -means of which the slide is held at anydesired point upon the bar 11. The plunger 28 is mounted in a suitableopening in the frame 22, as shown in Fig'. 3, and is depressed by meansof a spring 29, which is held in place by a screw-cap 30, which issecured upon the top of the frame 22. The vertical arm 26 is provided atits upper end with an eye, as stated in a preceding' sentence, and thiseye is slipped over the end of a lever 31, pivotally mounted at 32 upona pivot-pin arranged transversely of the casing C and slotted at 32' forthe passage of a small bolt 33, by means of which there is secured tothe end of the lever a slotted extension member 34. By means of theextension member 34 and the bolt 33 the length of the lever may beaccurately adjusted as required. At the end of the extension member 34thereis hinged a link or rod 35, the upper end of which is hinged to alever 36, made up of two slotted sections 37 and 38, united by anadjusting- The member 38 is formed into a segmental rack 40 at the end,and this rack is in mesh with a small pinion 41, loosely mounted uponthe shaft 16.

The front end of the shaft 16 projects beyond the pinion 41 and issquared, as shown in Fig. 5, for engagement with a squared opening in asmall hand or pointer 42. A similar hand or pointer 43 is associatedwith the loose pinion 41, and both of the hands move over a dial D,provided near its periphery with concentric scales 44 and 45, the formeror inner scale being' that on which weights are indicated and the latteror outer scale being that on which values are shown.

As will have been readily seen from the foregoing description, the smallhand 42 will be caused to move over the scale 44 when a weight is placedin the pan P and the frame 7 is drawn downward thereby. The downwardmovement of the frame 7 produces, of course, a corresponding movement inthe vertical arm 13, and the rack thereon causes a rotation in clockwisedirection of the pinion 15 and small shaft 16 upon which the hand 42 ismounted. rIhe `movement of the hand 43 will depend upon the position ofthe slide 21 on the bar 11, its movement being least when the slide isat the left end of the bar and being greatest when the slide is at theright end, as will be readily seen, since the effective length of thelever-arm upon which the vertical arm of the slide pulls is greatestwhen the slide is at the left end of bar 1l and least when the slide isat the opposite end; but whenever the platform is depressed by a weightplaced thereon the hand 43 will be caused to move over the scale 45, andthe magnitude of its travel will bc proportionateto the number on thescale 12 at which the slide 21 is set.

The shaft 19, with the counterweight 20, is provided in order to act asa brake upon the oscillatory movement of the frame 7 when a weight isplaced in the platform, and thus to bring the hands 42 and 43 to restover the scales 44 and 45 as quickly as possible.

As the exact manner of connecting the parts of the apparatus and ofsupporting the shaft therein forms no part of this invention, detailedillustration of the bearings and other minor features of constructionhave been omitted for the sake of brevity.

Itis to be understood that while the preferred form of embodiment of theinvention has been described and illustrated various changes in theform, proportions, and exact manner of assemblage of the parts of themechanism may be made without departing from the spirit of the inventionor sacrificing its advantages, and th e right to make such changeswithin the scope of the appended claims is therefore reserved.

Having thus described the construction and operation of my invention,what l claim as new, and desire to secure by Letters Patent, is*

1. The combination in acomputing-scale, of a dial graduated to indicateweights and values, hands movable over said dial to indicate weights andvalues, a platform, means operated by descent of the platform toimpartmovement to the weight-indicating hand proportional to themovement of the platform, a graduated horizontal bar mounted formovement with the platform, a price-indicator slidably mounted on saidbar, a lever disposed parallel to said bar, a vertical arm on thepriceindicator engaging said lever, and connections between said leverand the value-indicating hand whereby a movement of said handproportional to the movement of said lever is brought about.

2. The combination in acomputing-scale, of a dial bearing value andweight graduations thereon, value and weight indicating hands movableover said dial, a vertically-movable platform, connections between saidplatform and the weight-indicating hand causing movement of said handproportional to that of platform, a graduated horizontal bar movablewith said platform, a price-indicator slidable on said bar and having avertical arm, a lever engaged by said arm normally parallel with saidbar, means on said price-indicator for securing it in adjusted position,and connections between said lever and the value-indicating hand wherebymovement of said hand proportional to the movement of said leverresults.

3. The combination inacomputing-scale, of a dial graduated to indicatevalues and weights, a shaft at the center of said dial bearing aweight-indicating hand and having a pinion rigidly secured thereto, avertically-movable platform, a rack connected with said platform,

IOO

'and in mesh with said pinion, a g'raduated horizontal bar mounted formovement with said platform, a price-indicating' slide mounted on saidbar and having a vertical arm, a lever engaged by said arm and normallyparallel with said bar, a value-indicating hand movable over said dialand connections between said value -indicating hand and said leverwhereby movement of said hand proportional to the movement of said leverresults.

4. The combination in a computing-scale, of a dial graduated to indicateweights and values, hands movable over said dial, a verticallymovableplatform connected with one of said hands to impart movement theretoproper'- tional to the movement of the platform, a graduatedhorizontally-disposed bar mounted for movement with said platform, aprice-indicator slide mounted on said bar and having a vertical arm, anextensible lever engaged by said arm and normally parallel with saidbar, and connections between said lever and one of said hands wherebymovement of said hand proportional to the movement of the lever results.

5. The combination in a computing-scale, of a dial graduated to indicateweights and values, hands movable over said dial, a verticallymovableplatform, connections between said platform and the weight-indicatinghand, a graduated horizontal bar mounted for movement with saidplatform, a price-indicator slide mounted on said bar and having avertical arm, a lever engaged by said vertical arm and held normallyparallel with said bar, connections between said lever and one of saidhands, whereby movement of said hand proportional to the movement ofsaid lever results, and a weighted shaft to which rotary movement isimparted by the vertical movement of said platform.

6, The combination in a computing-scale, of a vertically-movableplatform, a graduated horizontal bar mounted for movement therewith, aprice-indicator slide mounted on said bar and provided with an arm, apivoted lever engaged by said arm and held normally parallel with saidbar, a member having a surface graduated to indicate weights and values,members movable over said surface, direct connections between one ofsaid members and said platform, and connections between the other ofsaid members and said lever whereby movement of said member proportionalto the movement of said lever results.

In testimony that I claim the foregoing as my own I have hereto afhxedmy sig'nature in the presence of two witnesses.

ALBERT B. CAMPER.

7i tnesses:

N. XV. PHELPS, Tiros. L. ENGLEBY.

